A pilgrim (from the Latinperegrinus) is a traveler (literally one who has come from afar) who is on a journey to a holy place. Typically, this is a physical journey (often on foot) to some place of special significance to the adherent of a particular religious belief system. In the spiritual literature of Christianity, the concept of pilgrim and pilgrimage may refer to the experience of life in the world (considered as a period of exile) or to the inner path of the spiritual aspirant from a state of wretchedness to a state of beatitude.

In the early period of Hebrew history, pilgrims traveled to Shiloh, Dan, Bethel, and eventually Jerusalem (see also Three Pilgrimage Festivals, a practice followed by other Abrahamic religions). While many pilgrims travel toward a specific location, a physical destination is not always a necessity. One group of pilgrims in early Celtic Christianity were the Peregrinari Pro Christ, (Pilgrims for Christ), or "white martyrs", who left their homes to wander in the world.[2] This sort of pilgrimage was an ascetic religious practice, as the pilgrim left the security of home and the clan for an unknown destination, trusting completely in Divine Providence. These travels often resulted in the founding of new abbeys and the spread of Christianity among the pagan population in Britain and in continental Europe.

Places of pilgrimage in the Buddhist world include those associated with the life of the historical Buddha: his supposed birthplace and childhood home (Lumbini and Kapilavastu in Nepal) and place of enlightenment (Bodh Gaya in northern India), other places he is believed to have visited and the place of his death (or Parinirvana), Kushinagar, India. Others include the many temples and monasteries with relics of the Buddha or Buddhist saints such as the Temple of the Tooth in Sri Lanka and the numerous sites associated with teachers and patriarchs of the various traditions. Hindu pilgrimage destinations may be holy cities (Varanasi, Badrinath); rivers (the Ganges, the Yamuna); mountains (several Himalayan peaks are sacred to both Hindus and Buddhists); caves (such as the Batu Caves near Kuala Lumpur, Malaysia); temples; festivals, such as the peripatetic Kumbh Mela, in 2001 the biggest public gathering in history;[3] or the tombs and dwelling places of saints (Alandi, Shirdi).

A modern phenomenon is the cultural pilgrimage which, while involving a personal journey, is secular in nature. Destinations for such pilgrims can include historic sites of national or cultural importance, and can be defined as places "of cultural significance: an artist's home, the location of a pivotal event or an iconic destination".[9] An example might be a baseball fan visiting Cooperstown, New York. Destinations for cultural pilgrims include Auschwitz concentration camp, Gettysburg Battlefield or the Ernest Hemingway House.[9] Cultural pilgrims may also travel on religious pilgrimage routes, such as the Way of St. James, with the perspective of making it a historic or architectural tour rather than – or as well as – a religious experience.[10] Under communist regimes, devout secular pilgrims visited locations such as the Mausoleum of Lenin, the Mausoleum of Mao Zedong and the Birthplace of Karl Marx. Such visits were sometimes state-sponsored. Sites such as these continue to attract visitors. The distinction between religious, cultural or political pilgrimage and tourism is not necessarily always clear or rigid. Pilgrimage could also refer symbolically to journeys, largely on foot, to places where the concerned person(s) expect(s) to find spiritual and/or personal salvation. In the words of adventurer-author Jon Krakauer in his book Into The Wild, Christopher McCandless was 'a pilgrim perhaps' to Alaska in search of spiritual bliss.[11]

^"Noteworthy Events in the Modern-day History of Jehovah's Witnesses", Jehovah's Witnesses – Proclaimers of God's Kingdom, page 719, "1894 Traveling overseers that in time came to be known as pilgrims (today, circuit and district overseers) are sent out in connection with the Society's program for visiting congregations"

^"Switzerland and Liechtenstein", 1987 Yearbook of Jehovah's Witnesses, page 123, "'Pilgrims' were traveling representatives of the [Watch Tower] Society, as circuit overseers are today. Their efforts contributed to the unity of the brothers and brought them into closer contact with God's organization. The Society would announce in Zion's Watch Tower the proposed itinerary of the pilgrim brothers, and congregations and smaller groups along these routes would then write and express their desire to be visited. The pilgrims were excellent speakers, and their public lectures were usually well attended. In 1913, for example, their audiences in Switzerland totaled some 8,000 persons."

^"Development of the Organization Structure", Jehovah's Witnesses – Proclaimers of God's Kingdom, page 222, "[Beginning] in 1894, arrangements were made for the [Watch Tower] Society to have well-qualified speakers travel more regularly to help the Bible Students to grow in knowledge and appreciation for the truth and to draw them closer together. ...An effort was made to have each group in the United States and Canada visited twice a year, though not usually by the same brother. In selecting these traveling speakers, emphasis was placed on meekness, humility, and clear understanding of the truth as well as loyal adherence to it and ability to teach it with clarity. Theirs was by no means a paid ministry. They were simply provided with food and lodging by the local brothers, and to the extent necessary, the Society helped them with travel expenses. They came to be known as pilgrims. Many of these traveling representatives of the Society were dearly loved by those whom they served. A. H. Macmillan, a Canadian, is remembered as a brother to whom God's Word proved to be "like a burning fire."